Fire-extinguisher.



s. mnwoon. FIRE EXTINGUISHER. APPLICATION FILED MAY 2, 1912.

- Patented May 20, 1913.

WIT M58858 llW/E/VTOR Sum 'Fer" L Ham-wood ATTORNEYS UNITED STATESPATENT OFFICE.

SUMPTER LEA HABWOOD, OF DUBLIN, GEORGIA.

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Specification of Letters Patent.

Patented May 20, 1913.

Application filed May 2, 1912. Serial No. 694,605.

T 0 all whom, it may concern Be it known that I, SUMPTER L. HARWOOD,

. a citizen of the United States, and a resident vice remains capable ofbeing put to instant "views.

use when occasion arises.

Reference is to be had to the accompanying drawings forming a part ofthis specifi- 20.

cation, in which the same characters of reference indicate the same;parts in' all the Figure 1 is a longitudinal sectional view of myextinguisher; Fig. 2 is another longi-. tudinal sectional View taken ona plane at right-angles to the plane of section to Fig. 1; and Fig. 3 isa horizontal sectional view on'the line 3 of Fig.2.

Referring particularly to the drawings my extinguisher comprises ahollow body 1 having a head 2 closing. oneend 9f t esame, this headbeingprovided with an inwardextending boss 3, which has a screw-threadedbore to receive a rod 4. The inner end of this bore may be provided witha packing shown at 5, which surrounds the rod 4 and serves to make aliquid-tight connection between the bore and the stem to prevent leakageof the contents of the body 1. The other end of the extinguisher isprovided with a head 6, the two heads 2 and 6 being secured together bymeans of tiearods 7 passing through lugs 8, which extend outward fromthe peripheries of the heads, these tie-rods being tightened by means ofwing nuts 9, at

one end, and ordinary nuts or heads 10 at the other. They hold the head6 to the body, and a suitable packing may be arranged between the headsand the ends of the sides of the'body to make a perfectly tight joint.

The head 6 is provided centrally of the same with a packing glandcomprising a nut 12, through which passes an operating rod 11. Thisoperating rod terminates at its outer end in a knob or handle 13, andex-. tends inward to a point adjacent the inner end of the rod 4. Theinside ofthe casing 1 contains suitable chemicals in liquid solution,and the rod 11 serves to carry a suitable reagent by means of'w-hichfire extinguishng gas can be generated whenever occasion arises to putthe fire extinguisher into use.

Inside'the casing 1 and extending almost the entire distance from thehead 2 to the head 6 is a tube 14 having at its lower end a piece ofgauze 15. This tube 14 has'screw' threaded engagement with an aperturein the head 6, and communicates with the interior of a cap 16 which ispreferably made integral with the'head 6, this cap '16 having ascrew-threaded b'or'e which receives a nipple l7 terminating in a flange18, this nipple "being hollow, and theflange 18 serving to securethe/end of a hose thereon. The bore through the nipple 17 is controlledby a valve 19, so that the .flow of gas from'the interior of the body 1can be controlled.

The numeral 20 indicates an operating arm for the valve 19, and it isprovided with a longitudinal slot 21. At'its outer end this arm 20 hasalateral recess 22 which fits around the rod lloutside of the casing;and when this notch or recess receives the rod the valve 19 will beclosed.

. 24 represents an arm fixed to the rod 11 by means of a hub 25, thishub being secured to the rod by any suitable means, such as a set-screw,at the outer end, of. the same adjacent the knob 13. Thisarm carries apin 23 which engages with the slot 21, and normally the hub 25 will restupon the outer end of the rod 20 in which the recess 22 is formed toretain the knob 13 a certain distance from the head 6'. The end of therod,

20 is thickened, as shown in Figs. 1 and 2, and the recess .22 is formedin the thickened portion, ,so that the thickened'end containing therecess will take up a considerable spacebetween the outer end of the nut12 and the inner end of" the hub 25.

The inner end of the rod 11 is threaded, as shownlat' 26, and thisthreaded inner end receives a pair. of locking nuts 27 between which issecured a yoke 28. This yoke has alined perforations through whichpassesa glass tube 29. This glass tube is closed by a stopper 30. Thebody 1 is adapted to contain a basic liquid solution, such as ordinarysoda; and the glass tube 29 will ordinarily contain sulfuric acid. Whenthe parts are in the position shown in the drawings the valve Will'beclosed and the end of the arm contains.

-having the recess 22 will hold the rod 11 in such posit-ion that theglass tube 29 will be spaced from the end of the rod 4. In this positionthe partsv will be inoperative, and no matter how much rough handlingthe extinguisher may be subjected to the tube 29 will be kept away fromthe rod 4;, so as not to be broken at the wrong time,

and thus generate gas when it is not needed. In case of emergency,however, the knob 13 is grasped by the hand and turned. Owing to thefactthat the arm 24: is fixed to the rod 11, this arm will turn with it,rotating the arm 20 through its pin and slot engagement therewith. Thevalve 19 will be opened and the thickened end of the arm 20 having therecess 22 will be swung away from the rod 11. The knob 13 can now bepushed to move the rod 11 inward, driving the glass tube 29 against therod 4, and breaking it so as to liberate the acid which it The acid willat once generate carbonic acid gas, which is very inert, and

does not support combustion. This gas will displace the atmosphere fromthe vicinity 'of the fire and smother the flames by de-.

priving them of oxygen, and the fire will thus be quickly extinguished.[I may of course use any" chemicals which will serve the purpose andform gas which will extinguish the fire; and I wish to have itunderstood that the description and drawings illustrate but oneembodiment of' my in- 'vention, and that I'do not care to be limited tothe exact details herein shown and described, except in so far asset-forth in the accompanying claims.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

1. In an improvement of the kind described, the combination of a hollowbody .having a discharge nozzle, a valve for convalve and then moved toforce the-vessel against the projection inside the body to break thesame and allow the chemicals to react, part of the products of saidreaction passing outward through said nozzle.

y 2. In an improvement -of the kind described, the combination of ahollow body having a discharge nozzle, a projection inside of saidhollow body, a rod passing through the wall of said body into the same,a vessel carried by said rod at its inner end adjacent said projection,said body and said vessel being adapted to contain chemicals, a

valve for said nozzle, means carried by said valve for engaging the rod,to keep the vessel away from the projection, and means carried by therod to engage the valve to open the sameand move said holding means outof position, whereby the rod can be forced inward to strike the vesselagainst the wall 'of said body, a vessel carried at I the inner end ofsaid rod, said vessel and said body .containing chemicals, a dischargenozzle for said body, a valvev in said nozzle having an arm with athickened end, said thickened end having a recess receiving the outerend of said rod, and an arm non-rotatably secured to said rod beyondsaid valve arm and having pin and slot engagement with said valve ,arm,whereby when therod is turned the valve will be opened and the armthereof swung away from, the rod to permit the rod to be forced inwardto break the vessel against the projection and allow the chemicals toreact, part of the products of said reaction passing outward throughsaid nozzle.

4. In an improvement of the kind described, the combination of a hollowbody having a discharge opening, means for controlling said dischargeopening, an arm carried by said controlling means having, a stopthereon, means for movably mounting a fragile vessel containing achemical in said body engaged by said stop, and an arm carried by saidlast-named means engaging the first arm to move the controlling means toopen position before the said "essel can be broken.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

SUMPTER LEA HARVVOOD Witnesses:

- G. L. DIXON,

H. R. Mom'rr.

